Former Democratic aide pleads guilty to doxing GOP senators attending Kavanaugh hearing

A former congressional Democratic staff member pleaded guilty on Friday to posting private information about Republican senators who took part in the hearings on sexual assault allegations against then-Supreme Court nominee Brett KavanaughBrett Michael KavanaughSecond ex-Senate staffer charged in aiding doxxing of GOP senators Second ex-Senate staffer charged in aiding doxxing of GOP senators Supreme Court hands Virginia Democrats a win in gerrymandering case MORE.

Jackson Cosko, 27, pleaded guilty to two counts of making public restricted personal information and one count each of computer fraud, witness tampering and obstruction of justice, The Washington Post reported.

The five federal felony counts carry maximum penalties up to 20 years in prison. In accordance with a plea agreement, prosecutors said a sentencing range of 46 to 57 months applied under federal guidelines.

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Cosko, who has served about four months in jail since he was charged, will be sentenced on June 13, the newspaper noted.

The agreement comes after Cosko was accused of releasing the private information of five Republican senators last year.

Cosko was reportedly upset after he had been fired from the office of Sen. Maggie HassanMargaret (Maggie) HassanSecond ex-Senate staffer charged in aiding doxxing of GOP senators Second ex-Senate staffer charged in aiding doxxing of GOP senators Key endorsements: A who's who in early states MORE (D-N.H.) in May. He said in court filings that he had "engaged in an extraordinarily extensive data theft scheme" by burglarizing the office several times after his ouster to steal sensitive information he could use later.

According to the Post, Cosko said he "became angry" on Sept. 27 as he watched Kavanaugh, President TrumpDonald John TrumpBooker hits Biden's defense of remarks about segregationist senators: 'He's better than this' Booker hits Biden's defense of remarks about segregationist senators: 'He's better than this' Trump says Democrats are handing out subpoenas 'like they're cookies' MORE’s then-Supreme Court nominee, testify before the Senate Judiciary Committee. Kavanaugh's hearing came after he was accused of sexual assault by Christine Blasey Ford.

Ford testified before the Senate panel in late September that she had been assaulted by Kavanaugh when they were in high school in the 1980s. He vehemently denied Ford's and two other women's allegations in his own subsequent hearing.

Cosko admitted to the court that he responded to the contentious hearings by anonymously editing the Wikipedia pages of five Republican senators to add their phone numbers and home addresses, according to the Post.

The information was quickly removed when it was discovered, and aides contacted authorities.

Cosko said the group included GOP Senate Judiciary Committee members Lindsey GrahamLindsey Olin GrahamSecond ex-Senate staffer charged in aiding doxxing of GOP senators Second ex-Senate staffer charged in aiding doxxing of GOP senators Meghan McCain clashes with Joy Behar as the 'sacrificial Republican' on 'The View' MORE (S.C.), Mike LeeMichael (Mike) Shumway LeeSecond ex-Senate staffer charged in aiding doxxing of GOP senators Second ex-Senate staffer charged in aiding doxxing of GOP senators Overnight Defense: Shanahan exit shocks Washington | Pentagon left rudderless | Lawmakers want answers on Mideast troop deployment | Senate could vote on Saudi arms deal this week | Pompeo says Trump doesn't want war with Iran MORE (Utah) and Orrin HatchOrrin Grant HatchTrump awards Presidential Medal of Freedom to economist, former Reagan adviser Arthur Laffer Trump awards Presidential Medal of Freedom to economist, former Reagan adviser Arthur Laffer Second ex-Senate staffer charged in aiding doxxing of GOP senators MORE (Utah) as well as Sen. Rand PaulRandal (Rand) Howard PaulSenate to vote Thursday to block Trump's Saudi arms deal Senate to vote Thursday to block Trump's Saudi arms deal Overnight Defense: Shanahan exit shocks Washington | Pentagon left rudderless | Lawmakers want answers on Mideast troop deployment | Senate could vote on Saudi arms deal this week | Pompeo says Trump doesn't want war with Iran MORE (R-Ky.) and Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellOvernight Defense: House passes T spending package with defense funds | Senate set to vote on blocking Saudi arms sales | UN nominee defends climate change record Overnight Defense: House passes T spending package with defense funds | Senate set to vote on blocking Saudi arms sales | UN nominee defends climate change record Senate to vote Thursday to block Trump's Saudi arms deal MORE (R-Ky.).

Cosko was caught sneaking into Hassan’s office after 10 p.m.  to log on to an aide’s computer. He was recognized by another staffer and ordered to leave, according to court papers.

The other aide then received a threatening email minutes later with the subject line "I own Everything." The message reportedly stated, "If you tell anyone I will leak it all. Emails signal conversations gmails. Senators children’s health information and socials," according to plea papers reviewed by the Post.

Cosko was arrested on Oct. 3.